| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Uhrichsville | city | Ohio | United States | 40.39 | -81.35 | 898 | |
| Ulm's Mobile Home Court I | city | Ohio | United States | 40.83 | -84.35 | 830 | |
| Ulm's Mobile Home Court II | city | Ohio | United States | 40.83 | -84.34 | 830 | |
| Ulric | city | Ohio | United States | 38.91 | -81.86 | 830 | |
| Umbria (historical) | city | Ohio | United States | 40.40 | -82.19 | 1030 | |
| Union | city | Ohio | United States | 39.90 | -84.31 | 898 | |
| Union City | city | Ohio | United States | 40.20 | -84.81 | 1053 | |
| Union City Mobile Home Park | city | Ohio | United States | 40.20 | -84.80 | 1053 | |
| Union Corners | city | Ohio | United States | 40.08 | -84.49 | 997 | |
| Union Furnace | city | Ohio | United States | 39.46 | -82.36 | 866 | |
| Union Ridge | city | Ohio | United States | 40.77 | -80.58 | 1197 | |
| Union Station | city | Ohio | United States | 40.02 | -82.51 | 997 | |
| Unionport | city | Ohio | United States | 40.36 | -80.85 | 1099 | |
| Uniontown | city | Ohio | United States | 40.13 | -80.99 | 1141 | |
| Uniontown | city | Ohio | United States | 40.98 | -81.41 | 1190 | |
| Unionvale | city | Ohio | United States | 40.27 | -80.93 | 1059 | |
| Unionville | city | Ohio | United States | 40.50 | -81.72 | 1197 | |
| Unionville | city | Ohio | United States | 40.86 | -80.74 | 1200 | |
| Unionville | city | Ohio | United States | 39.63 | -81.72 | 830 | |
| Unionville | city | Ohio | United States | 41.78 | -81.00 | 830 | |
| Unionville | city | Ohio | United States | 39.45 | -81.46 | 830 | |
| Unionville Center | city | Ohio | United States | 40.14 | -83.34 | 984 | |
| Uniopolis | city | Ohio | United States | 40.60 | -84.09 | 944 | |
| Unity | city | Ohio | United States | 38.89 | -83.52 | 931 | |
| Unity | city | Ohio | United States | 40.86 | -80.56 | 1197 | |
| University Heights | city | Ohio | United States | 39.28 | -82.14 | 830 | |
| University Heights | city | Ohio | United States | 41.50 | -81.54 | 1056 | |
| Uno | city | Ohio | United States | 40.34 | -84.27 | 997 | |
| Updyke Addition | city | Ohio | United States | 41.57 | -83.42 | 830 | |
| Upland Heights | city | Ohio | United States | 40.16 | -80.72 | 925 | |
| Upper Arlington | city | Ohio | United States | 39.99 | -83.06 | 830 | |
| Upper Arlington | city | Ohio | United States | 39.52 | -84.38 | 830 | |
| Upper Dayton View | city | Ohio | United States | 39.78 | -84.23 | 898 | |
| Upper Fivemile | city | Ohio | United States | 39.12 | -83.93 | 898 | |
| Upper Fox Hollow | city | Ohio | United States | 39.96 | -83.86 | 974 | |
| Upper Lowell | city | Ohio | United States | 39.54 | -81.52 | 830 | |
| Upper Sandusky | city | Ohio | United States | 40.83 | -83.28 | 830 | |
| Upper Tauwa (historical) | city | Ohio | United States | 41.01 | -84.02 | 830 | |
| Upper Valley Trailer Court | city | Ohio | United States | 39.83 | -84.06 | 830 | |
| Upton | city | Ohio | United States | 41.42 | -83.01 | 830 | |
| Ural (historical) | city | Ohio | United States | 39.26 | -82.38 | 830 | |
| Urban Hill | city | Ohio | United States | 40.85 | -81.62 | 1095 | |
| Urbana | city | Ohio | United States | 40.11 | -83.75 | 1053 | |
| Urbancrest | city | Ohio | United States | 39.90 | -83.09 | 830 | |
| Usrey Mobile Home Park | city | Ohio | United States | 39.41 | -84.07 | 908 | |
| Utica | city | Ohio | United States | 39.50 | -84.16 | 941 | |
| Utica | city | Ohio | United States | 40.23 | -82.45 | 997 | |
| Utley | city | Ohio | United States | 39.39 | -81.91 | 830 | |
| Utopia | city | Ohio | United States | 38.78 | -84.06 | 830 |